stat 10 Chafley Fall 2017 omework: Homework #12 core: 0 of 1 pt 901 12(8 complet
ID: 2930352 • Letter: S
Question
stat 10 Chafley Fall 2017 omework: Homework #12 core: 0 of 1 pt 901 12(8 complete) HW Score: 66 67%, 8 of 12 p 1.31 n a survey conducted by a reputable markating egency, 261 of 1000 adults 19 years of age batheoom (confessions inckaded testing and arewering phone calls) Conglete parts (a) through t balkw or oldar confessed to bringing and using thair col phone every tp be Click here Its value is based on a sample D The sample size is large E It is information obtsined from a survey What is the source of variability in the random variabla? , Random errors The sample size The individuals selected to be in the studhy The question asked in the survey e em-,-.. [e Construct and inter rat a 9 % c de ce iterval for the population proportic of adults 19 years of age bathroom Select the correct choice below and tll in any answer boxes within your choice Type indegers or decmals rounded to three decimal places as needed. Use ascending order j ader whe tring her cel to we ara :% conddent the proportion of adults 19 years or age or older who bring her col phone overy uip to the hallwoon"bete- EL There i. N chance the proportion et adubs 19 reara od age or older who bring ther cel phone nary tre, to the hamon . to selct nd eer your answers) and then clck Check Ansenr 1Explanation / Answer
1) Its value is based on a sample
2) Individuals Selected to be in the study
3) There is a 95% chance that .....
Between 0.234 and 0.288
Calculations -
Standard error of the mean = SEM = x(N-x)/N3 = 0.014
= (1-CL)/2 = 0.025
Standard normal deviate for = Z = 1.960
Proportion of positive results = P = x/N = 0.261
Lower bound = P - (Z*SEM) = 0.234
Upper bound = P + (Z*SEM) = 0.288
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